Mold having movable plate-shaped core

ABSTRACT

A mold for fabricating an optical fiber connector is disclosed. The optical fiber connector includes a blind hole for accommodating an optical fiber and an aspherical lens portion for being optically coaxial with the optical fiber. The mold includes a rod-shaped core for forming the blind hole and a plate-shaped core. The plate-shaped core includes an aspherical recess for forming the lens portion. The aspherical recess faces the rod-shaped core and is adjustably movable relative to the rod-shaped core to achieve alignment between the aspherical recess and the rod-shaped core.

CROSS REFERENCE

This application is a divisional application of patent application Ser. No. 12/979,350 filed on Dec. 28, 2010 from which it claims the benefit of priority under 35 U.S.C. 120. The patent application Ser. No. 12/979,350 in turn claims the benefit of priority under 35 USC 119 from TaiWan Patent Application 099129857, filed on Sep. 3, 2010.

BACKGROUND

1. Technical Field

The present disclosure relates to a mold having movable plate-shaped cores for fabricating an optical fiber connector.

2. Description of the Related Art

Optical fiber connectors are widely used as interfaces for high-speed transmission of electronic data between two electronic devices. An optical fiber connector is generally fabricated using an injection mold, and includes a male connector and a female connector coupled with the male connector. The male connector and the female connector each encompasses a lens portion, a blind hole facing the lens portion, and an optical fiber accommodated in the blind hole. How well the lens portion is positioned to be optically coaxial with the optical fiber plays a vital role in the transmission of electronic data. Therefore, a mold for fabricating the optical fiber connector that can ensure precise alignment of the lens portion to be optically coaxial with the optical fiber is needed.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present circuit board assembly could be better understood with reference to the accompanying drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the circuit board assembly. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is an isometric, assembled view of a mold for fabricating an optical fiber connector in accordance with an exemplary embodiment.

FIG. 2 is an isometric, exploded view of the mold of FIG. 1.

FIG. 3 shows a cross-sectional view of the mold of FIG. 1, taken along line

DETAILED DESCRIPTION

Embodiments of the present mold will now be described in detail below and with reference to the drawings.

FIGS. 1 through 3 show a mold 100 for fabricating an optical fiber connector. The mold 100 includes a male mold 10, a female mold 20 for coupling with the male mold 10, four rod-shaped cores 30 for forming four blind holes of the optical fiber connector, two plate-shaped cores 40 for forming four aspherical lens portions of the optical fiber connector, and eight rectangular spacers 50.

The male mold 10 includes a first parting surface 101 and defines a molding cavity 11 from the first parting surface 101 toward an inner portion of the male mold 10. The rod-shaped cores 30 extend through the male mold 10 with an end portion of the rod-shaped cores 30 exposed in the molding cavity 11. The female mold 20 includes a second parting surface 202 for coupling with the first parting surface 101 and defines two separated through holes 21 passing through the second parting surface 202. Each plate-shaped core 40 has an end surface 41 and defines two separated aspherical recesses 42 from the end surface 41 toward an inner portion of the plate-shaped core 40. Each aspherical recess 42 has the same shape and size as an aspherical lens portion to be fabricated. The plate-shaped cores 40 each extends through one of the through holes 21, with the end surface 41 protruding beyond the second parting surface 202.

Spacers 50 are selectively accommodated in a through hole 21 and contact the plate-shaped core 40. The number of spacers 50 used are however many are needed for finely adjusting alignment of the plate-shaped core 40 relative to the rod-shaped cores 30 such that each of the cavities 42 can be optically coupled with a rod-shaped core 30.

To fabricate the optical fiber connector, the male mold 10 is coupled with the female mold 20 in a manner that has the first parting surface 101 contacting the second parting surface 202. That is, the end surfaces 41 of the plate-shaped cores 40 exposes in the molding cavity 11, and each aspherical recess 42 is optically coupled with one of the rod-shaped cores 30. Molten plastic is then injected into the molding cavity 11. Hence, the molding cavity 11 and the recesses 42 are filled with the plastic, four aspherical lens portions each having the same size and shape as the recesses 42 and four blind holes each having the same size and shape as the rod-shaped cores 30 are obtained. Next, the female mold 20 is separated from the male mold 10, and the rod-shaped cores 30 are removed. Thereafter, four optical fibers are assembled into the blind holes. In this manner, each optical fiber is optically coaxial with a corresponding lens portion.

In alternate embodiments, the end surface 41 is aligned with the second parting surface 202, and the molding cavity 11 is defined in the female mold 20.

It will be understood that the above particular embodiments are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure as claimed. The above-described embodiments illustrate the possible scope of the disclosure but do not restrict the scope of the disclosure. 

What is claimed is:
 1. A mold for fabricating an optical fiber connector, the optical fiber connector comprising a blind hole for accommodating an optical fiber and an aspherical lens portion for optically coupling with the optical fiber, the mold comprising: a rod-shaped core for forming the blind hole; and a plate-shaped core comprising an aspherical recess for forming the lens portion, the aspherical recess facing the rod-shaped core, the plate-shaped core being adjustably movable relative to the rod-shaped core so as to achieve alignment between the aspherical recess and the rod-shaped core.
 2. The mold of claim 1, comprising a male mold, the rod-shaped core extending through the male mold.
 3. The mold of claim 1, comprising a female mold, the plate-shaped core extending through the female mold and being movable relative to the female mold.
 4. The mold of claim 1, comprising a spacer disposed between the plate-shaped core and the female mold.
 5. A mold for fabricating an optical fiber connector, comprising: a male mold; a female mold attached to the male mold, the male mold and the female mold cooperatively defining a molding cavity, the female mold having a through hole in communication with the molding cavity; a plate-shaped core extending through the through hole, the plate-shaped core having a distal end exposed in the molding cavity and a plurality of aspherical recesses defined in the distal end; and a plurality of spacers selectively disposed between the plate-shaped core and the female mold in the through hole, the spacers configured for adjusting the plate-shaped core.
 6. The mold of claim 5, wherein another distal end of the plate-shaped core is opposite to the distal end exposed in the molding cavity and is positioned outside the female mold. 